Assuming the watch is running, 2400 Euros is like dirtcheap, too good to be true. Are you sure the watch is not hot? I mean stolen? Something sounds not right with the price. A 5513 from 1966 in nice condition will command anywhere up from 4500 US Dollars. Be careful is all I can say, if a deal sounds too god to be true, I most likely is?????????????? If the seller puts this watch on Ebay, he may get 3500 Euros for it, so I am not sure why he would sell it so cheap...